{"product_id":"fritz-rpm-liquid-pt-1-alkalinity-reef-supplement","title":"Fritz RPM Liquid PT 1 Alkalinity | 2-Part Alkalinity Supplement for Reef Aquariums","description":"\u003cstyle\u003e\n  .aq-pd { font-family: Georgia, serif; color: #1a1a1a; max-width: 860px; margin: 0 auto; line-height: 1.7; }\n  .aq-pd h2 { font-size: 1.45em; font-weight: 700; letter-spacing: -0.01em; border-left: 4px solid #FF5722; padding-left: 12px; margin: 2em 0 0.6em; }\n  .aq-pd h3 { font-size: 1.05em; font-weight: 700; margin: 1.2em 0 0.4em; color: #FF5722; text-transform: uppercase; letter-spacing: 0.06em; font-family: Arial, sans-serif; }\n  .aq-pd p { margin: 0.5em 0 1em; }\n  .aq-callout { background: #1a1a1a; color: #fff; border-radius: 4px; padding: 16px 20px; margin: 1.6em 0; font-family: Arial, sans-serif; font-size: 0.93em; line-height: 1.6; }\n  .aq-callout strong { color: #f5c518; }\n  .aq-features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 1em 0 1.6em; }\n  .aq-feature-card { background: #f4f4f4; border-radius: 4px; padding: 14px 16px; border-left: 3px solid #FF5722; font-family: Arial, sans-serif; font-size: 0.9em; }\n  .aq-feature-card strong { display: block; margin-bottom: 3px; color: #1a1a1a; }\n  .aq-feature-card span { color: #555; }\n  .aq-compare { overflow-x: auto; margin: 1em 0 1.6em; }\n  .aq-compare table { width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 0.88em; min-width: 520px; }\n  .aq-compare th { background: #FF5722; color: #fff; padding: 9px 14px; text-align: center; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }\n  .aq-compare th:first-child { background: #1a1a1a; text-align: left; }\n  .aq-compare td { padding: 8px 14px; border-bottom: 1px solid #ddd; text-align: center; }\n  .aq-compare td:first-child { text-align: left; font-weight: 600; color: #444; background: #fafafa; }\n  .aq-compare tr:nth-child(even) td:not(:first-child) { background: #fff8f8; }\n  .aq-check { color: #27ae60; font-weight: 700; }\n  .aq-dash { color: #bbb; }\n  .aq-specs-table { width: 100%; border-collapse: collapse; margin-top: 1em; font-family: Arial, sans-serif; font-size: 0.93em; }\n  .aq-specs-table th { background: #1a1a1a; color: #fff; text-align: left; padding: 9px 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82em; }\n  .aq-specs-table td { padding: 8px 14px; border-bottom: 1px solid #e5e5e5; vertical-align: top; }\n  .aq-specs-table tr:nth-child(even) td { background: #f9f9f9; }\n  .aq-specs-table td:first-child { font-weight: 600; width: 45%; color: #444; }\n  .aq-tab-radio { display: none; }\n  .aq-tab-labels { display: flex; flex-wrap: wrap; gap: 8px; margin: 1.4em 0 0; }\n  .aq-tab-label { display: inline-block; padding: 10px 22px; border: 2px solid #FF5722; background: #fff; color: #FF5722; font-weight: 700; font-family: Arial, sans-serif; font-size: 0.9em; cursor: pointer; border-radius: 3px; letter-spacing: 0.04em; transition: background 0.15s, color 0.15s; user-select: none; }\n  .aq-tab-label:hover { background: #ffd7c2; }\n  .aq-tab-panel { display: none; }\n  #aq-tab-16:checked ~ .aq-tab-labels label[for=\"aq-tab-16\"],\n  #aq-tab-32:checked ~ .aq-tab-labels label[for=\"aq-tab-32\"],\n  #aq-tab-1g:checked ~ .aq-tab-labels label[for=\"aq-tab-1g\"],\n  #aq-tab-5g:checked ~ .aq-tab-labels label[for=\"aq-tab-5g\"] { background: #FF5722; color: #fff; }\n  #aq-tab-16:checked ~ .aq-panels #aq-panel-16,\n  #aq-tab-32:checked ~ .aq-panels #aq-panel-32,\n  #aq-tab-1g:checked ~ .aq-panels #aq-panel-1g,\n  #aq-tab-5g:checked ~ .aq-panels #aq-panel-5g { display: block; }\n  .aq-note { font-family: Arial, sans-serif; font-size: 0.82em; color: #777; margin-top: -0.5em; font-style: italic; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"aq-pd\"\u003e\n\n  \u003cp\u003e\u003cstrong\u003eFritz RPM Liquid PT 1 Alkalinity\u003c\/strong\u003e is part one of the Fritz \u003cem\u003eReef Pro Mineral\u003c\/em\u003e two-part dosing system, formulated to replenish the alkalinity (KH) consumed by growing SPS, LPS, and soft corals. Made with pharmaceutical-grade ingredients in the USA, RPM PT 1 keeps your reef chemistry stable between water changes so corals can color up and skeletons can keep building.\u003c\/p\u003e\n\n  \u003cp\u003ePair PT 1 with Fritz RPM PT 2 (Calcium) for full two-part dosing, and verify your levels with a precision \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/salifert-kh-alkalinity-test-kit\"\u003eSalifert KH\/Alkalinity Test Kit\u003c\/a\u003e or the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hanna-hi772-dkh-alkalinity-colorimeter\"\u003eHanna dKH Alkalinity Checker\u003c\/a\u003e. Browse the full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eadditives \u0026amp; supplements collection\u003c\/a\u003e for the rest of your reef chemistry lineup.\u003c\/p\u003e\n\n  \u003cdiv class=\"aq-callout\"\u003e\n    \u003cstrong\u003ePharmaceutical-grade. Made in the USA.\u003c\/strong\u003e Every Fritz RPM bottle is blended from high-purity raw materials and quality-tested. No fillers, no surprises — just clean, predictable alkalinity dosing.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eHow It Works\u003c\/h2\u003e\n  \u003cp\u003eCorals consume alkalinity (carbonate hardness) as they build their calcium-carbonate skeletons. As KH drops, coral growth slows, polyp extension diminishes, and stressed tissue can recede. RPM PT 1 delivers a balanced liquid alkalinity supplement that you dose daily — alongside RPM PT 2 (calcium) — to keep dKH steady inside the reef-safe range of 8.0–9.5 dKH.\u003c\/p\u003e\n\n  \u003ch2\u003eFeatures — All Sizes\u003c\/h2\u003e\n  \u003cdiv class=\"aq-features\"\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003ePharmaceutical-Grade\u003c\/strong\u003e\u003cspan\u003eHigh-purity raw materials, no industrial fillers.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eTwo-Part Balanced\u003c\/strong\u003e\u003cspan\u003eDesigned to dose alongside RPM PT 2 (Calcium) in equal volumes.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eReef-Safe Formula\u003c\/strong\u003e\u003cspan\u003eSafe for SPS, LPS, soft corals, anemones, and reef inverts.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eLiquid — No Mixing\u003c\/strong\u003e\u003cspan\u003ePour straight from the bottle — no stirring powders into RO\/DI.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e\u003cspan\u003eManufactured by Fritz Aquatics in Mesquite, Texas.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003ePredictable Dosing\u003c\/strong\u003e\u003cspan\u003e~1 mL per gallon raises alkalinity by ~0.7 dKH (typical).\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eWorks With Dosers\u003c\/strong\u003e\u003cspan\u003eLiquid form is ideal for automatic dosing pumps and gravity reservoirs.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eStable Shelf Life\u003c\/strong\u003e\u003cspan\u003eSealed bottles store well in a cool, dark cabinet.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eChoose Your Size — Variant Comparison\u003c\/h2\u003e\n  \u003cp class=\"aq-note\"\u003eSelect a size in the tab section below for the full individual spec sheet.\u003c\/p\u003e\n  \u003cdiv class=\"aq-compare\"\u003e\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eSpec\u003c\/th\u003e\n          \u003cth\u003e16 oz\u003c\/th\u003e\n          \u003cth\u003e32 oz\u003c\/th\u003e\n          \u003cth\u003e1 Gallon\u003c\/th\u003e\n          \u003cth\u003e5 Gallon\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e473 mL\u003c\/td\u003e\n\u003ctd\u003e946 mL\u003c\/td\u003e\n\u003ctd\u003e3.78 L\u003c\/td\u003e\n\u003ctd\u003e18.9 L\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e80300\u003c\/td\u003e\n\u003ctd\u003e80301\u003c\/td\u003e\n\u003ctd\u003e80303\u003c\/td\u003e\n\u003ctd\u003e80304\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eRound bottle\u003c\/td\u003e\n\u003ctd\u003eRound bottle\u003c\/td\u003e\n\u003ctd\u003eJug w\/ handle\u003c\/td\u003e\n\u003ctd\u003eBucket w\/ handle\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eIdeal For\u003c\/td\u003e\n\u003ctd\u003eNano \/ pico reefs\u003c\/td\u003e\n\u003ctd\u003eSmall reefs 20–60 gal\u003c\/td\u003e\n\u003ctd\u003eMid reefs 60–180 gal\u003c\/td\u003e\n\u003ctd\u003eLarge \/ multi-tank systems\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWorks With Dosers\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"aq-check\"\u003e✓\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"aq-check\"\u003e✓\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"aq-check\"\u003e✓\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"aq-check\"\u003e✓\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eDetailed Variant Specifications\u003c\/h2\u003e\n  \u003cp\u003eClick a size below to view its full specification sheet.\u003c\/p\u003e\n\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-16\" name=\"aq-spec-tab\" checked\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-32\" name=\"aq-spec-tab\"\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-1g\" name=\"aq-spec-tab\"\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-5g\" name=\"aq-spec-tab\"\u003e\n\n  \u003cdiv class=\"aq-tab-labels\"\u003e\n    \u003clabel for=\"aq-tab-16\" class=\"aq-tab-label\"\u003e16 oz — Nano\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-32\" class=\"aq-tab-label\"\u003e32 oz — Small\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-1g\" class=\"aq-tab-label\"\u003e1 Gallon — Mid\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-5g\" class=\"aq-tab-label\"\u003e5 Gallon — Large\u003c\/label\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"aq-panels\"\u003e\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-16\"\u003e\n      \u003ch3\u003e16 oz · Nano-Reef Bottle · SKU 80300\u003c\/h3\u003e\n      \u003cp\u003eThe 16 oz bottle is sized for nano and pico reef hobbyists running tanks up to about 20 gallons, or for anyone who wants to trial RPM dosing before committing to a larger jug.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e80300\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e16 fl oz (473 mL)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eNano \u0026amp; pico reefs (≤ 20 gal)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDispensing\u003c\/td\u003e\n\u003ctd\u003ePour cap, manual or doser\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFritz Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-32\"\u003e\n      \u003ch3\u003e32 oz · Small-Reef Bottle · SKU 80301\u003c\/h3\u003e\n      \u003cp\u003eThe 32 oz bottle is the everyday size for small reefs in the 20–60 gallon range. About double the dosing runway of the 16 oz with the same convenient bottle format.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e80301\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e32 fl oz (946 mL)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eSmall reefs (20–60 gal)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDispensing\u003c\/td\u003e\n\u003ctd\u003ePour cap, manual or doser\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFritz Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-1g\"\u003e\n      \u003ch3\u003e1 Gallon · Mid-Reef Jug · SKU 80303\u003c\/h3\u003e\n      \u003cp\u003eThe 1 Gallon jug is the sweet spot for the typical mid-sized reef tank (60–180 gallons). Best value per ounce for hobbyists running daily two-part doses with a peristaltic doser.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e80303\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e1 US Gallon (3.78 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eMid reefs (60–180 gal)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDispensing\u003c\/td\u003e\n\u003ctd\u003eCarry handle, gravity-feed or doser pickup\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFritz Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-5g\"\u003e\n      \u003ch3\u003e5 Gallon · Large-System Bucket · SKU 80304\u003c\/h3\u003e\n      \u003cp\u003eThe 5 Gallon bucket is built for large reefs, frag systems, and multi-tank fishrooms. Months of dosing runway in one container; pulls comfortably with a stiff dosing tube and weighted strainer.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e80304\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e5 US Gallons (18.9 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eLarge reefs, frag tanks, multi-tank rooms\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDispensing\u003c\/td\u003e\n\u003ctd\u003eSealed bucket w\/ handle, dosing tube pickup\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFritz Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhich Size Is Right for You?\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003e16 oz\u003c\/strong\u003e — Pick this for pico\/nano reefs (≤ 20 gal), or to trial RPM dosing before stepping up.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e32 oz\u003c\/strong\u003e — The everyday size for small reefs in the 20–60 gallon range.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e1 Gallon\u003c\/strong\u003e — Best value for the typical mid-reef hobbyist running daily two-part doses on a 60–180 gallon system.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e5 Gallon\u003c\/strong\u003e — The choice for large reefs, frag systems, and anyone running multiple tanks who wants months of runway.\u003c\/p\u003e\n\n  \u003ch2\u003eHow to Dose\u003c\/h2\u003e\n  \u003cp\u003eBegin by testing your current alkalinity to establish a baseline. As a starting point, dose \u003cstrong\u003e1 mL of RPM PT 1 per gallon of tank water\u003c\/strong\u003e to raise alkalinity approximately \u003cstrong\u003e0.7 dKH\u003c\/strong\u003e — then adjust based on your daily consumption rate after running a 48-hour test sequence. Always dose PT 1 and PT 2 separately (different times of day, or different points in the sump) to avoid precipitation. Never combine them in the same dosing reservoir.\u003c\/p\u003e\n\n  \u003ch2\u003eFAQ\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eDo I need to dose PT 2 (Calcium) at the same time?\u003c\/strong\u003e\u003cbr\u003eYes — RPM is a two-part system. Alkalinity and calcium are consumed together by coral skeletal growth, so dose roughly equal volumes of PT 1 and PT 2 daily, spaced apart by at least an hour to prevent precipitation.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWhat dKH should I target?\u003c\/strong\u003e\u003cbr\u003eMost reef hobbyists target \u003cstrong\u003e8.0–9.5 dKH\u003c\/strong\u003e. SPS-dominant tanks often dial in tighter (8.5–8.8) and prefer rock-stable readings over high numbers.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eCan I use this in a fish-only saltwater tank?\u003c\/strong\u003e\u003cbr\u003eYou can, but there's no need — fish-only systems don't consume alkalinity quickly. Weekly water changes with a quality reef salt cover everything a FOWLR tank needs.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWill PT 1 affect pH?\u003c\/strong\u003e\u003cbr\u003eYes — alkalinity supplements can nudge pH upward briefly after dosing. This is normal; the effect dampens as the buffer integrates into the system.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eIs it safe for refugiums, sumps, and inverts?\u003c\/strong\u003e\u003cbr\u003eYes. RPM PT 1 is reef-safe when dosed at the recommended rate and is compatible with shrimp, snails, starfish, anemones, and macroalgae refugiums.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Fritz","offers":[{"title":"16 oz","offer_id":48741978341595,"sku":"80300","price":9.59,"currency_code":"USD","in_stock":true},{"title":"32 oz","offer_id":48741978374363,"sku":"80301","price":11.99,"currency_code":"USD","in_stock":true},{"title":"1 Gallon","offer_id":48741978407131,"sku":"80303","price":23.99,"currency_code":"USD","in_stock":false},{"title":"5 Gallon","offer_id":48742011896027,"sku":"80304","price":65.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_aa24ebaa-2ae0-4181-99ea-034b9515d6cf.png?v=1777898343","url":"https:\/\/squeakysaquatics.com\/products\/fritz-rpm-liquid-pt-1-alkalinity-reef-supplement","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}